Spinning frame



w. s. EAs'rMAN s'PINNNG FRAME Filed June 4, 1940 sept. 23, 1941.

Patented Sept. 23, 1941 SPINNING FRAME Walter S. Eastman, Glendale, R. I., assignor to Stillwater Worsted Mills, a corporation of Rhode Island Application June 4, 1940, Serial No. 338,790

24 Claims.

My invention relates to spinning frames.

It has among its objects to provide an improved spinning frame, and, more particularly, one wherein it is made possible to produce materially stronger yarn. A further object of my invention is to provide such an improved mechanism wherein it is made possible to divorce the twist from the draft while maintaining the yarn under pressure in an improved manner enabling stronger yarn to be produced and reducing` breakage of the same. A still further object of my invention is to provide such an improved pressure mechanism having improved yarn supporting and pressure means cooperating with any usual top front roll of the spinning frame in an improved manner while disposed in an improved position relative thereto and to the yarn and yarn guide. A still further object of my invention is to provide an improved pressure attachment including such an improved pressure means and adapted to be applied to a standard spinning frame with facility and at small expense in such manner as to enable my improved results to be obtained. These and other objects and advantages of my improvements will, however, hereinafter more fully appear.

In the accompanying drawing, I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In the drawing:

Figure l is a sectional end elevation of a portion of a spinning frame embodying my improvements;

Fig. 2 is a front elevation of the same;

Fig. 3 is a sectional View on line 3-3 of Figure l, and

Fig, 4 is a perspective View showing my improved roll and its supporting bracket removed from the frame.

In this illustrative construction, I have shown a spinning frame including a usual carriage stand, generally indicated at I, and carrying drafting mechanism including usual top and bottom back rolls 2 and 3, usual carrier rolls 4 operating upon the roving or yarn 5 before the latter passes between the usual front rolls, herein comprising the cork covered top front roll 6 and the lower fluted front roll 1, and from which rolls 6 and 1 the drafted and twisted yarn usually passes to whirled bobbins 8 under suitable caps 9; my improvements herein including improved pressure mechanism acting on the yarn after it has passed between the rolls 6 and 1 and before it passes to the bobbins 8.

Referring more particularly to my improved construction, it will be noted that I provide a l new cooperating roll I0 acting upon the yarn at a point in front `of the nip of rolls 6 and 1 at a point substantially below the axis of they roll 6, one of these rolls I0 being provided for cooperation with each cork covered roll 6. Herein, a pair of rolls I0 cooperating with a pair of adjacent rolls 6 is connected together, the rolls III herein being formed on the ends of an elongated roll carrying member II having journal pins I2 projecting from its opposite ends. As shown, this member I I with the rolls I0 on the opposite ends thereof is movable in upright slots I3 -on the lower ends of bracket members I4, and the upper ends of these members I4 4are suitably connected to the carriage stand horn I5 on opposite sides of adjacent rolls 6 and between the opposite sides of the latter and the next adjacent rolls 6. Further, it will be noted that springs I6 provide journals for the pins I2 and are connected between the latter and suitable connections I1 on the upperA ends of the brackets I4, these springs acting to hold the rolls IU on the member II normally in contact with the undersides of the cooperating cork vcovered top front rolls 6. While other material may be used if desired, herein the rolls Iii are formed of hard wood with a smooth surface, it being found that such material has a coefficient of friction sufficiently close to that of the cork rolls 6 to produce a satisfactory operating combination. Further, herein, for convenience both of lthese rolls Iii are provided in the form of cylindrical enlargements on the opposite end of an integral hard wood roll carrying member I I. Attention is also directed to the fact that the rolls I0 are so disposed that the yarn passes oil from the top thereof at a point above the center of a closed pigtail I8 carried in a usual position on the frame spaced beneath the latter and above the top of the cap 9.

In the operation of my improved construction, it will be noted that the rolls 6 and 1 continue to perform their drafting function. However, my improved rolls I0, one of which cooperates with each pair of rolls 6 and 1, pass the drafted yarn into contact with the underside of the cork covered rolls 6 at points spaced in front of the nip of the rolls 6 and 1. As a result, after the completion of the drafting process, a short length of yarn engaging the undersidek of the rolls 6 throughout its length and indicated at 5a, is provided between the nip of the rolls 6, 1,l and the nip of the rolls 6, I0. Further, it will be noted that this length 5a is of drafted but untwisted yarn and that an extension thereof, indicated at Saa, extends from the nip of the rolls 6, IIJ over the rolls l0, the twisting process not beginning at a; point on the roll 'I or, as usual, at the nip of the rolls 6, 1, but instead beginning, as shown in Fig. 3, where the yarn passes downward off of the curved yarn supporting surface provided by the tops of the pressure rolls I which are rotated by the rolls 6. Thus, a twisted section b of yarn, shorter than that usual heretofore, is provided in which the yarn is not twisted until it leaves my improved yarn pressing and supporting rolls I0, and from which the yarn then passes directly down (Figure 3) into the closed pigtail 'guide I8 in such manner that the twist beginning'at the roll l0 causes this yarn section 5b to` bev rotated around and in uniform contact with the entire inner circumference of the pigtail I8, while the twist is a continuous twist extending clear down from theroll I0 to the bottom ofthe cap 9. i

VAs a resultof my improved construction, it is made possible to obtain a materially stronger yarn than that heretofore obtainable, the yarn in` fact being approximately twentyl per cent stronger. This is believed to be due to the divorc-V ing of the drafting and twisting processes made possible by my improved yarn pressing and supporting rolls l0 whereby the shorter lengths of yarn Saa, 5bare produced between the rolls 6 and the bobbins, and also to the improved twisting action and the new uniform pressure on the yarn made possible by the provision of the pressure rolls IU cooperating with the top front rolls as-above described. Yarn breakage is also reduced by this improved construction, which also makes possible an improved contactlwithithe pigtail as well as the use `of a large cap and obtaining a substantially larger do than heretofore. The increased strength of the yarn also makes possible higher operating speeds and larger packages than possible heretofore, while due tothe larger packages, it is also made possible to eliminate doubling. By having the pressure rolls-cooperate with the relatively smooth top front rolls 6, rather than the fluted rolls 1, in addition to supporting the yarn while free from pressure and spacing the beginning of twisting and obtaining markedly more uniform pressure, my improved construction also makes it possible to eliminate excessive wear on the pressure rolls while also making it possible to utilize hard wood or metal pressure rolls Without causing shearing of the yarn by the uted rolls 1. These, and other advantages of my improvements will, however, be apparent to those skilled in the art.

While I have in this application specifically i described one form which my invention may assume in practice, it will be understood that the same has been chosen for purposes of illustration and that the invention may bemodied and embodied in other forms without departing from its spirit or the scope of the appendedclaims.

What I claim as new and desireto secureby Letters Patent is: k v

l; In a spinning frame, drafting mechanism including cooperating front rolls, and mechanism fondivorcing the twisting function from the drafting function of said rolls including means for eecting twisting while maintaining the yarn under pressure and spacing the beginning of twisting from said pressure. Y

2.1 In a spinning frame, drafting mechanism including cooperating front rolls, and mechanism for `divorcing the twisting function from the drafting function of saidrrolls including means for effecting twisting while maintaining the yarn under substantially uniform pressure and supporting free from said pressure the portion of the yarn where twisting begins.

3. In a spinning frame, ydrafting mechanism including cooperating front rolls, and mechanism for divorcing the twisting function from the draftingfunction of said rolls and for effecting subsequent twisting including yarn supporting means for maintaining the yarn under pres- `sure and thereafter supporting the same free from pressure during twisting.

- 4. Ina spinning frame, drafting mechanism including cooperating front rolls, and mechanism for divorcing the twisting function from the drafting function of said rolls and for effecting subsequent twisting including yarn supporting means for maintaining the yarn pressed against the top, front roll during twisting and having a portion out of contact with said roll supporting the yarn to be twisted, free from pressure during twisting. I Y

K- 5. AIn a spinning frame, drafting mechanism including cooperating front rolls, and mechanism for divorcing the twisting function from the drafting function of said rolls and for effecting subsequent twisting including pressure means pressing the .yarn against the top front roll and supporting the yarn after it passes through said pressure means. y

6. In a spinning frame, drafting mechanism including cooperating front rolls, and pressure mechanism including yarn supporting pressure means disposed in front of the nip of said front rolls and having a portion supporting the yarn after it is freed from the pressure of said pressure means, and means acting on said pressure means for pressing the yarn against the top front roll.

v'l'. In a spinning frame, drafting mechanism including cooperating front rolls, and twisting mechanism including yarn supporting pressure means disposed in front of the nip of said front rolls and having a portion supporting the yarn after it is freed from the pressure of said pressure means, and means actingon said pressure means for pressing the yarn against the underside of the top front roll.

8. In a spinning frame, drafting mechanism including cooperating front rolls, and pressure mechanism including a yarn supporting pressure roll in front of the nip of said front rolls and supporting the yarn after it is freed from the pressure of said pressure roll and means acting on said'pressure roll for pressing the, yarn against thetop front roll. v

9t In a spinning frame, drafting mechanism 'including cooperating front rolls, and pressure mechanismincluding a yarn` supporting. pressure roll spaced out of operative relation with the lowerfront roll in front of the nip of said front rolls and disposed under the top roll, and means acting on said pressure roll for pressing thl yarn against the underside of said top front ro v10.(In a spinning frame, drafting mechanism including cooperating front rolls, pressure mechanismincluding a yarn supportingl pressure member over which yarn passes in front of the nip of said front rolls, and means acting on said memberfor pressing the yarn against the top front roll, said yarn supporting pressure member maintaining the yarn pressed against the top roll and supporting the portion of the same to be twisted, free from pressure while the yarn passes off of said pressure member.

11. In a spinning frame, drafting mechanism including cooperating front rolls and pressure mechanism including a pressure member in front of the nip of said front rolls, and means acting on said pressure member for pressing the yarn against the top front roll, said pressure member having a surface pressing the yarn against the surface of said top roll and a yarn supporting surface in front of said pressure surface and spacing the point where the yarn leaves said supporting surface from the point where the yarn is freed from pressure.

12. In a spinning frame, drafting mechanism including cooperating front rolls, and pressure mechanism including a yarn supporting pressure roll over which the yarn passes in front of the nip of said front rolls and means acting on said pressure roll for pressing the yarn against the top front roll at a laterally spaced point from the point where the yarn leaves said pressure roll, said top roll having a cork surface and said pressure roll having a surface having a coefficient of friction adapted to cooperate with said cork surface.

13. In a spinning frame, drafting mechanism including cooperating front rolls, and mechanism for divorcing twisting from the drafting function of said rolls including yarn supporting pressure means over which the yarn passes for pressing the yarn against the -top front roll, and means out of contact with said top roll for supporting, free from pressure, the yarn to be twisted as it passes from said pressure means.

14. In a spinning frame, drafting mechanism including cooperating front rolls, mechanism for divorcing twisting from the drafting function of said rolls including yarn supporting means for maintaining the drafted yarn under pressure, means for supporting, free from pressure, the yarn to be twisted as it passes from said pressure means, and twisting mechanism including an annular guide having its center directly below the point where the yarn leaves said supporting means.

15. In a spinning frame, drafting mechanism including cooperating front rolls, and mechanism for divorcing twisting from said rolls including means for maintaining the drafted yarn under pressure, vand yarn supporting means for laterally spacing the beginning of twisting from the pressed portion of the yarn while maintaining the portion to be twisted free from pressure.

16. In a spinning frame, drafting mechanism including cooperating front rolls, pressure mechanism including yarn supporting pressure means over which the yarn passes in front of the nip of said front rolls for pressing the yarn against the top front roll and for supporting, free from pressure, the yarn leaving said pressure means, and twisting mechanism including a closed circumferential guide having its center spaced directly below the point where the yarn leaves said pressure means.

17. In a spinning frame, drafting mechanism including cooperating front rolls, pressure mechanism including pressure means in front of the nip of said front rolls for pressing the yarn against the top front roll and having a yarn supporting portion over which the yarn passes downward off of said portion after being freed from said pressure, and twisting mechanism in.-

cluding a closed circumferential guide having its center spaced directly below the point where the yarn leaves said portion.

18. In a spinning frame, drafting mechanism including cooperating adjacent pairs of front rolls, and pressure mechanism including yarn supporting pressure rolls over which the yarn passes in front of the nip of said front rolls for pressing the yarn against the top front rolls and having a roll carrying member carrying said pressure rolls at opposite ends thereof, and means acting on said member normally maintaining said pressure rolls in operative position.

19. In a spinning frame, drafting mechanism including cooperating adjacent pairs of front rolls, and pressure mechanism including yarn supporting pressure rolls over which the yarn passes in front of the nip of said front rolls for pressing the yarn against the top front rolls and having a roll carrying member carrying said pressure ro-lls at opposite ends thereof, and tensioning means acting on said member normally maintaining said pressure rolls in operative position.

20. In an attachment for spinning frames having front drafting rolls, pressure mechanism including yarn supporting pressure means over which the yarn passes for pressing the yarn against the top front drafting roll in front of the nip of said front rolls and for supporting, free from pressure, the yarn leaving said pressure means, and means for maintaining said yarn supporting pressure means pressed' toward said top roll.

21. In an attachment for spinning frames having front drafting rolls, pressure mechanism including a pressure means for pressing the yarn against the top front drafting roll in front of the nip of said front rolls, and means for maintaining said pressure means pressed toward said top roll, said pressure means having a portion supporting the yarn and over which the latter passes downward after being freed from the pressure of said pressure means.

22. In an attachment for spinning frames having front drafting rolls, pressure mechanism including a yarn supporting pressure roll over which the yarn passes for pressing the yarn against the top front drafting roll in front of the nip of said front rolls and supporting, free from pressure, the yarn leaving said roll, and means for maintaining said yarn supporting pressure roll in operative relation with said top roll.

23. Mechanism for divorcing the twisting function from the drafting function of top and bottom front drafting rolls including means for maintaining under pressure an intermediate portion of the yarn leading away from said bottom roll, and means for supporting the portion of the yarn to be twisted while maintaining it free from pressure.

24. Mechanism for divorcing the twisting function from the drafting function of top and bottom front drafting rolls including mean-s for maintaining an intermediate portion of the drafted yarn under pressure, means receiving the yarn from said pressure means for supporting the portion of the yarn to be twisted while maintaining it free from pressure, and means for twisting the yarn leaving said supporting means so that twisting begins where the yarn passes off of said supporting means.

WALTER S. EASTMAN.

CERTIFICATE OE COREECTTON. Y Patent No. 2, 257,0LL1. l september 25, 19)

WALTER S. EASTIVLAN.

It is hereby Certified that error appears in the above numbered P: ent requiring correction as'follovvs: ln the drawing, strike outpresl Figures l, 2 and 5, and insert instead the following wifi mi and that the said Letters Patent should be read with this correct therein that the same may Conform to the record of the oase in the ent Office.

signed and eeeled this Lush dey ef November, A. D. 19in.

Henry Van Arsdale, 

